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Phone	HTC ThunderBolt	HTC Amaze 4G	LG PM-225	Siemens CT66 / C66 / C65 / C71 / C70	Motorola Charm
Current U.S. Carriers	(none)	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released	Released
Display Size	4.3" diag. 5 : 3	4.3" diag. 16 : 9	?	?	2.8" diag. 4 : 3
Display Resolution & Type	480 x 800 pixels (~217 ppi) LCD (TFT/TFD)	540 x 960 pixels (~256 ppi) LCD (TFT/TFD)	128 x 160 pixels LCD (STN)	130 x 130 pixels LCD (Color)	320 x 240 pixels (~143 ppi) LCD (TFT/TFD)
Display Refresh	60 Hz	60 Hz	?	?	60 Hz
Battery	1,400 mAh	1,730 mAh	1,000 mAh	600 mAh	1,170 mAh
Processor	1 GHz Qualcomm Snapdragon S2 MSM8655	1.5 GHz Qualcomm Snapdragon S3 dual-core	?	?	720 MHz TI OMAP3410
RAM	768 MB	1 GB	?	?	?
Storage	8 GB	16 GB	? raw hardware	? raw hardware	? raw hardware
Main Camera	8 megapixel	8 megapixel	Yes	Yes	3 megapixel
Wide Camera	-	-	-	-	-
Tele Camera	-	-	-	-	-
Video Capture	720p HD	1080p HD	-	-	?
Front Camera	1 megapixel	2 megapixel	-	-	-
Weight	5.78 oz (164g)	6.1 oz (173g)	3.35 oz (95g)	3 oz (85g)	3.88 oz (110g)
Dimensions	4.8" x 2.6" x 0.52" (122 x 66 x 13.2 mm)	5.12" x 2.58" x 0.46" (130 x 66 x 11.7 mm)	3.53" x 1.76" x 0.93" (90 x 45 x 23.6 mm)	4.1" x 1.8" x 0.7" (104 x 46 x 17.8 mm)	3.87" x 2.65" x 0.45" (98 x 67 x 11.4 mm)
Form Factor	Slab	Slab	Clamshell	Slab	Slab
Platform / OS	Android	Android	(proprietary)	(proprietary)	Android
Network Bands	4G LTE: 13 CDMA: 850, 1900	WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900	CDMA: 850, 1900 AMPS: 850	GSM: 850, 1800, 1900 *	WCDMA: 4 GSM: 850, 900, 1800, 1900 *
Data Technology	LTE (Cat 3)	HSPA+ 42	1xRTT	GPRS	HSDPA 3.6
Features
Flashlight	Yes	Yes	-	-	-
GPS / Location	n/a	n/a	Yes	-	n/a
Accessibility
Hearing Aid Compatible	Yes	Yes M3, T3 (mostly tele-coil compatible)	-	-	-
Multiple Languages	n/a	n/a	Yes	Yes	n/a
TTY/TDD (Digital)	Yes	Yes	Yes	-	Yes
Alerts
Extra Display	-	-	Yes	-	-
Ringer Profiles	-	-	-	Yes	-
Connectivity
Bluetooth	Yes	Yes	-	-	Yes
Infrared (IR)	-	-	-	Yes	-
Mobile Hotspot	n/a	n/a	-	-	n/a
NFC	-	Yes	-	-	-
USB	Yes Micro-USB	Yes	Yes	Yes	Yes Micro-USB
Wi-Fi	Yes 4 (802.11 b,g,n)	Yes 4 (802.11 a,b,g,n)	-	-	Yes 4 (802.11 b,g,n)
Contacts
Picture ID	n/a	n/a	Yes	Yes	n/a
Ringer ID	n/a	n/a	Yes	Yes	n/a
Voice Dialing	n/a	n/a	Yes	-	n/a
Customization
Changeable Body Plates	-	-	-	Yes	-
Custom Graphics	n/a	n/a	Yes	Yes	n/a
Custom Ringtones	n/a	n/a	Yes	Yes	n/a
Real-Music Ringers	n/a	n/a	-	-	n/a
Data & Network
Data Tethering	n/a	n/a	-	-	n/a
WAP / Web Browser	n/a	n/a	Yes	Yes	n/a
Input
Predictive Text Entry	n/a	n/a	Yes	Yes	n/a
Side Keys	Yes	Yes	Yes	-	Yes
Text Keyboard, Hardware	-	-	-	-	Yes
Touch Screen	Yes Capacitive	Yes Capacitive	-	-	Yes Capacitive
Memory
Memory Card Slot	Yes	Yes	-	-	Yes
Messaging
Email Client	n/a	n/a	-	-	n/a
EMS / Picture Messaging	n/a	n/a	-	Yes	n/a
Instant Messaging	n/a	n/a	-	-	n/a
MMS	n/a	n/a	-	Yes	n/a
Text Messaging Templates	n/a	n/a	-	Yes	n/a
Music
FM Radio	Yes	Yes	-	-	-
Headphone Jack (3.5mm)	Yes	Yes	-	-	Yes
Music Player	n/a	n/a	-	-	n/a
Photo & Video
DLNA	Yes	Yes	-	-	-
TV Output	-	Yes	-	-	-
Video Calling	n/a	n/a	-	-	n/a
Productivity
Alarm	n/a	n/a	Yes	Yes	n/a
Calculator	n/a	n/a	Yes	Yes	n/a
Calendar	n/a	n/a	Yes	Yes	n/a
To-Do List	n/a	n/a	-	Yes	n/a
Voice Memo	n/a	n/a	Yes	Yes	n/a
Software
Games	n/a	n/a	Yes	Yes	n/a
Java (J2ME)	n/a	n/a	Yes	Yes	n/a
Voice
Call Screening	-	-	-	Yes	-
Headset Jack (2.5 mm)	n/a	n/a	Yes	-	n/a
Push-To-Talk	-	-	-	Yes *	-
Speaker Phone	Yes	Yes	Yes	Yes	Yes
	* Some versions only
	HTC ThunderBolt	HTC Amaze 4G	LG PM-225	Siemens CT66 / C66 / C65 / C71 / C70	Motorola Charm
	X >	< X >	< X >	< X >	< X

NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	HTC ThunderBolt	HTC Amaze 4G	LG PM-225	Siemens CT66 / C66 / C65 / C71 / C70	Motorola Charm